EVA tunnel waterproofing board with strap design

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The EVA waterproof sheet production process employs a two-stage co-extrusion single die rod extrusion method domestically. The sheet is formed by adding reinforcing agents and antioxidants to the raw material resin EVA, then heating and melting it, plasticizing, extruding into shape, and pulling. It can also be thermally bonded into a composite waterproof sheet with geotextile (signal layer) equipped with slings, or it can be made using the extrusion calendering method, where the resin extruder melts and plasticizes, and then the molten sheet is extruded through a die and fused with slings, cooled and rolled into a smooth film, or combined with geotextile equipped with slings, cooled and rolled into a composite waterproof material.